How to get rid of food poisoning?

I got Chinese food Saturday (5 days ago) and I got food poisoning. I got used to get really bad belly cramps but they have mostly gotten better in the past 2 days. I can't eat, i have no appetite to eat. In the besides today all I ate was 4 bowls of cereal and a slice of bread. Problem is when I eat I get diarrhoea. Today I felt a lot better but still not up to eating. I woke at 7:30am but by around 4:30pm I was really hungry, I thought that was a good sign. For the first time in 21 hours I ate. I had HALF a bowl of soup and a slice of bread. Then straight after I got diarrhoea again and pains in my stomach. How do I help my self get back to normal?